package org.eoti.math.cf.constants;

import org.eoti.math.cf.ContinuedFraction;

import java.math.BigInteger;

/*
 * The MIT License
 *
 * Copyright (c) 2009 Malachi de AElfweald <malachid@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
public class pi
extends ContinuedFraction
{
	private static final BigInteger two = BigInteger.valueOf(2);

	public pi()
	{
		super();
	}

	public BigInteger getNumerator( BigInteger index ){
		if(BigInteger.ZERO.equals(index)) return two.multiply(two);
		return index.multiply(index);
	}

	public BigInteger getDenominator( BigInteger index ){
		if(BigInteger.ZERO.equals(index)) return BigInteger.ZERO;
		return (two.multiply(index)).subtract(BigInteger.ONE);
	}
}
